DURAN® Two-way Stopcock, double oblique bore, with PTFE key
- Manufactured from borosilicate glass 3.3
- With PTFE key
- Polished two-way stopcock for PTFE key
- Fat-free working through the polished tap surface
- The PTFE key is secured in the tap sleeve by a three-part tretainind device.
- Glass articles for further processing
Products

| Catalog No | Stopcock (NS) | Bore (mm) | Diameter d (mm) | Wall Thickness s (mm) | Quantity | |
|---|---|---|---|---|---|---|
| 286424208 | 14.5 | 2.5 | 8 | 1.5 | 10 | Find a distributor |
| 286425607 | 18.8 | 4 | 10 | 1.5 | 10 | Find a distributor |
| 286426003 | 21.5 | 6 | 13 | 1.5 | 10 | Find a distributor |
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
DURAN® patent valves complete with PTFE patent valve plugs are two-way valves, which are frequently used for the construction of steering lines (vacuum inert gas lines, nitrogen distribution rakes) and enable grease-free operation. The tap plug is secured in the tap sleeve by a three-part retaining device. We recommend the use of PRODURAN® valves for particularly high leakage rate requirements.
Products
Products

| Catalog No | Stopcock (NS) | Bore (mm) | Diameter d (mm) | Wall Thickness s (mm) | Quantity | |
|---|---|---|---|---|---|---|
| 286424208 | 14.5 | 2.5 | 8 | 1.5 | 10 | Find a distributor |
| 286425607 | 18.8 | 4 | 10 | 1.5 | 10 | Find a distributor |
| 286426003 | 21.5 | 6 | 13 | 1.5 | 10 | Find a distributor |
Specification
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
Product Overview
DURAN® patent valves complete with PTFE patent valve plugs are two-way valves, which are frequently used for the construction of steering lines (vacuum inert gas lines, nitrogen distribution rakes) and enable grease-free operation. The tap plug is secured in the tap sleeve by a three-part retaining device. We recommend the use of PRODURAN® valves for particularly high leakage rate requirements.
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